Implementing of fading animation with QML
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Overview[edit | edit source]
In the following QML code there are four ways to implement the fading of a 76ytuiytuityutyutututyutyutyu element using 76ytuiytuityutyutututyutyutyu when the rectangles are clicked. Different implementations suit different purposes, so use the most suitable one.
The code snippet is meant to be run with 76ytuiytuityutyutututyutyutyu.
Preconditions[edit | edit source]
- Qt 4.7 or higher is installed on your platform.
Source[edit | edit source]
ui.qml
import Qt 4.7
Rectangle {
width: 640; height: 480
color: "black"
Row {
anchors.centerIn: parent; spacing: 10
// Implements fading using Behavior
Rectangle {
id: fadingByBehavior
width: 100; height: 100; color: "red"
Behavior on opacity { PropertyAnimation { duration: 1000 } }
MouseArea { anchors.fill: parent; onClicked: fadingByBehavior.opacity = 0.2 }
}
// Implements fading using States and Transitions
Rectangle {
id: fadingByState
width: 100; height: 100; color: "green"
MouseArea { anchors.fill: parent; onClicked: fadingByState.state = "hidden" }
states: State { name: "hidden"; PropertyChanges { target: fadingByState; opacity: 0.2 } }
transitions: Transition {
from: "*"
to: "hidden"
PropertyAnimation { target: fadingByState; property: "opacity"; duration: 1000 }
}
}
// Implements fading using animation as an element
Rectangle {
id: fadingByAnimationElement
width: 100; height: 100; color: "blue"
MouseArea { anchors.fill: parent; onClicked: hideAnimation.start() }
PropertyAnimation {
id: hideAnimation
target: fadingByAnimationElement; property: "opacity"; to: 0.2; duration: 1000
}
}
// Implements fading directly from the event handler
Rectangle {
id: fadingFromSignalHandler
width: 100; height: 100; color: "yellow"
MouseArea {
anchors.fill: parent
onClicked: PropertyAnimation {
target: fadingFromSignalHandler; property: "opacity"; to: 0.2; duration: 1000
}
}
}
}
}
Postconditions[edit | edit source]
The code snippet demonstrated four different ways to implement a fading animation with 76ytuiytuityutyutututyutyutyu.